There are 'typical' leaks. In the engine compartment, most leak sources are above & ahead of the wetness because of gravity & road draft. There can be wind turbulence that can blow a drip stream away from the source, usually behind the engine. Try to follow the trail.
I have had to degrease heavy leakers because 'everything' was wet. Always diagnose first.
There are UV dyes that can be added to fluids to give a bright green trail with 'transparent' fluids.
If a component is bone dry on the outside, its fluid level is OK. If it is wet, you will want to check the fluid level.
Coolant leaks can dry before they reach the ground, but you will occasionally catch a whiff of it after parking the car & walking in front of it. Looking up under the engine, you may see a chalky trail from above with a drip hanging.
The transaxle can leak as well. If the bell-housing is wet, it might appear to be a rear main seal.